The 2nd century AD Greek historian, Appian of Alexandria, is usually thought of as above all, an ardent admirer of Rome (Oxford Classical Dictionary). Although he says admiring things about the overall Roman imperial achievement, Appian is at times fiercely critical of Roman behavior in his coverage of Romes conquests during the Republican period. Some of this he may get from his sources, but similar narrative patterns indicate that he had his own views on Romes often treacherous treatment of her enemies. This paper will examine particularly Appians accounts of Roman diplomacy before the outbreak of the Third Punic War, the Third Macedonian War and the First Mithradatic War.